Year % of total population 1960 50.6047719691375 1961 50.6432670956167 1962 50.6815652239161 1963 50.7129898515817 1964 50.7364499039413 1965 50.7747260411044 1966 50.8222015429412 1967 50.8609488616045 1968 50.8900862196852 1969 50.9183248147239 1970 50.9659871162426 1971 50.9309268914616 1972 50.8054519343849 1973 50.781531905632 1974 50.8345499406637 1975 50.8731401944207 1976 50.9186853204229 1977 50.9748316199929 1978 51.0287507373937 1979 51.0905624194064 1980 51.158379176392 1981 51.2199806295665 1982 51.295271491973 1983 51.3569943082312 1984 51.3616145268044 1985 51.3507392227383 1986 51.3344378955374 1987 51.2911374640376 1988 51.2229803551918 1989 51.1260143945202 1990 51.004676512785 1991 50.8948004523821 1992 50.8349594907999 1993 50.808299533397 1994 50.8107341752002 1995 50.8268426410882 1996 50.8211480099322 1997 50.7912076881344 1998 50.7262013249161 1999 50.6580893399076 2000 50.671903550736 2001 50.7018696883853 2002 50.6861203867122 2003 50.6268956975835 2004 50.5395510585686 2005 50.4909004861679 2006 50.4616811034623 2007 50.4405378145657 2008 50.3971266896559 2009 50.3229771746728 2010 50.2571637052083 2011 50.1632555393029 2012 50.0549393593863 2013 49.9727473272125 2014 49.9191647079769 2015 49.8510733955266 2016 49.7894063779783 2017 49.7565753174248 2018 49.724055909316 2019 49.7024870437906 2020 49.6823440392513 2021 49.6706662224454 2022 49.669625802387 2023 49.6681267258021